[ISS Support Case] Filling in missing data on tier-2 historian,

Last updated: October 17th, 2025

Description

Client is upgrading old tier-1 historian from 2014 R2 SP1 to 2023 P03. The old Tier-1 had an issue where the server lost some amount of data and did not replicate to tier-2. Client has the new tier-1 running side by side and this missing data is on new tier-1. Client is seeking best strategy to get consistent data up to tier 2 and get everything filled in on new system. Client has attempted to export data via SQL Query and import via fast load but getting error: "Importing data for tier 2 tags not allowed".

Author: Kevin Modlin
Published: October 17th, 2025

Details:

Product: Historian

Version: 2023

Solution: [Solution is visible below when you're logged in and have a current subscription]

Date Created:	06/18/2025
Case:	97849

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